Sealing structure for transparent cover of speed increasing box

Abstract

The utility model relates to the technical field of speed-increasing gearboxes, and discloses a sealing structure of a transparent cover of a speed-increasing gearbox, which solves the problem of lubricating oil leakage caused by failure of a single sealing layer, adopts a multi-stage sealing component design, and comprises a first-stage sealing unit, a second-stage sealing unit and a third-stage sealing unit, a step-by-step reinforced sealing system is formed, the sealing performance is improved, each stage of sealing unit is composed of the elastic supporting ring and the spring, the sealing effect is enhanced, the good buffering and compensating capacity is provided so as to adapt to thermal expansion and cold contraction and mechanical vibration of equipment, and meanwhile the sealing performance is improved. And a structural groove in the extrusion sealing mechanism and a damping spring on the main ring seat are combined with an extrusion elastic block, so that uniform pressure distribution on a sealing surface is realized, the abrasion of the sealing surface caused by non-uniform pressure is effectively avoided, and the service life of the sealing assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of speed increasing boxes, in particular to a sealing structure of a speed increasing box cover. Background Art

[0002] As a key component in the field of mechanical transmission, the speed increaser is widely used in many industries such as wind power generation, aerospace, automobile industry and mining equipment. In terms of technical implementation, the manufacturing technology requirements for key components such as the gears, housing and planetary carrier of the speed increaser are extremely strict. In addition, the sealing structure design of the speed increaser is also crucial to ensure its normal operation.

[0003] The existing Chinese patent with publication number CN220770095U discloses a speed increaser cover sealing structure, which is designed to reduce the overflow of lubricating oil during high-speed operation. The sealing shell is composed of a bottom ring plate, an inner ring body, an outer ring body and a supporting ring body to form a multi-layer sealing structure. Through a labyrinth seal, labyrinth channels one to nine are provided. The flow of lubricating oil is slowed down and overflow is reduced through step-by-step labyrinth seals. However, the multi-layer sealing structure of this scheme is an integrated design. When the main-stage sealing structure fails, there is no secondary-stage sealing structure and it cannot effectively assume the role of buffering or substitution, resulting in a sharp drop in the performance of the entire sealing system when the main seal fails. There is a lack of effective redundant protection mechanism, which makes the maintenance work complicated and usually requires the entire sealing structure to be replaced as a whole.

[0004] In view of the above-mentioned related technologies, a sealing structure of a speed increasing box cover is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0005] The utility model aims to provide a sealing structure for a speed increasing box cover. The device is adopted to work, thereby solving the problem of lubricating oil leakage caused by failure of a single sealing layer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing structure of a speed increasing box cover, comprising a cover body, a main base, and a secondary base, wherein the main base is fixedly arranged in the middle of one end surface of the cover body, and the secondary base is fixedly arranged in the middle of the main base, and an extrusion sealing mechanism and a multi-stage sealing assembly are respectively arranged on the main base, and the multi-stage sealing assembly is composed of a primary sealing unit, a secondary sealing unit, and a tertiary sealing unit;

[0007] The extrusion sealing mechanism includes a structural groove, a main ring seat, an extrusion elastic block and a damping spring. The main ring seat is fixedly connected to the outer wall of the main base. The main ring seat is circumferentially distributed with multiple structural grooves. Damping springs are fixedly arranged in the multiple structural grooves. The damping spring is fixedly connected to the extrusion elastic block.

[0008] Preferably, the size of the opening end of the structural groove is smaller than the size of the deep end, and the opening end abuts against the extrusion elastic block.

[0009] Preferably, an annular groove is formed on the main base.

[0010] Preferably, the primary sealing unit includes a primary support ring and a sealing gasket, the primary support ring is clamped on the annular groove, the sealing gasket is sleeved between the main base and the primary support ring, and the structure of the sealing gasket is a U-shaped gasket with a hollow interior.

[0011] Preferably, the secondary sealing unit includes a secondary support ring and a second spring. The outer wall of the connecting end of the secondary support ring is provided with a threaded groove. One end of the second spring is sleeved in the threaded groove on the secondary support ring, and the other end of the second spring is fixedly connected to the connection between the main base and the secondary base.

[0012] Preferably, the three-stage sealing unit includes a three-stage support ring and a No. 3 spring. The three-stage support ring is threaded on the outer wall of the secondary base. A threaded groove is provided on the outer wall of the connecting end of the three-stage support ring. One end of the No. 3 spring is sleeved on the secondary base, and the other end of the No. 3 spring is sleeved in the threaded groove on the outer wall of the connecting end of the three-stage support ring.

[0013] Preferably, the annular round wing ends of the primary support ring, the secondary support ring and the tertiary support ring are all components made of elastic materials.

[0014] Preferably, the sizes of the primary support ring, the secondary support ring and the tertiary support ring decrease in sequence.

[0015] Preferably, a friction ring is sleeved on the outer wall of the main base, and the friction ring is located between the cover body and the extrusion sealing mechanism.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The sealing structure of the speed increaser cover proposed by the utility model adopts a multi-stage sealing component design, including a primary sealing unit, a secondary sealing unit and a tertiary sealing unit, forming a step-by-step strengthened sealing system, improving the sealing performance, and ensuring the sealing reliability of the lubricating oil under various working conditions, especially at high-speed rotation. Each stage of the sealing unit is composed of an elastic support ring and a spring, which not only enhances the sealing effect, but also provides good buffering and compensation capabilities to adapt to the thermal expansion and contraction and mechanical vibration of the equipment.

[0018] 2. The utility model proposes a sealing structure for a speed increaser cover, which realizes uniform pressure distribution on the sealing surface by combining the structural groove on the extrusion sealing mechanism and the damping spring on the main ring seat with the extrusion elastic block, effectively avoiding the wear of the sealing surface caused by uneven pressure and extending the service life of the sealing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of one side of the utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the main base of the utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the multi-stage sealing assembly of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the extrusion sealing mechanism of the utility model;

[0024] Figure 6 It is a schematic diagram of the position structure of the thread groove of the utility model.

[0025] In the figure: 1, cover body; 11, main base; 110, annular groove; 12, secondary base; 2, friction ring; 3, extrusion sealing mechanism; 30, structural groove; 31, main ring seat; 32, extrusion elastic block; 33, damping spring; 4, multi-stage sealing assembly; 5, primary sealing unit; 51, primary support ring; 52, sealing gasket; 6, secondary sealing unit; 60, threaded groove; 61, secondary support ring; 62, No. 2 spring; 7, tertiary sealing unit; 71, tertiary support ring; 72, No. 3 spring. DETAILED DESCRIPTION

[0026] 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 in 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.

[0027] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0028] Combination Figure 1-Figure 6A sealing structure of a speed increaser cover comprises a cover body 1, a main base 11 and a secondary base 12. The main base 11 is fixedly provided in the middle of one end surface of the cover body 1. An annular groove 110 is provided on the main base 11. The setting of the annular groove 110 provides a stable support point for the primary support ring 51 in the primary sealing unit 5; a friction ring 2 is sleeved on the outer wall of the main base 11. The friction ring 2 is located between the cover body 1 and the extrusion sealing mechanism 3, which reduces the direct friction between the cover body and the sealing mechanism, plays an additional protective role, prolongs the service life of the sealing structure, and also provides additional sealing guarantee; a secondary base 12 is fixedly provided in the middle of the main base 11. An extrusion sealing mechanism 3 and a multi-stage sealing assembly 4 are respectively provided on the main base 11. The multi-stage sealing assembly 4 consists of a primary sealing unit 5, a secondary sealing unit 6 and a tertiary sealing unit 7.

[0029] The extrusion sealing mechanism 3 includes a structural groove 30, a main ring seat 31, an elastic block 32 and a damping spring 33. The main ring seat 31 is fixedly connected to the outer wall of the main base 11. A plurality of structural grooves 30 are circumferentially distributed on the main ring seat 31. Damping springs 33 are fixedly arranged in the plurality of structural grooves 30. The elastic block 32 is fixedly connected to the damping spring 33. Through the coordinated action of the structural groove 30, the main ring seat 31, the elastic block 32 and the damping spring 33, uniform pressure distribution on the sealing surface is achieved. The opening end size of the structural groove 30 is smaller than the depth end size, and the opening end abuts against the elastic block 32, which enhances the adaptability of the seal and enables it to better cope with different sealing pressures, thereby improving the reliability of the seal.

[0030] The primary sealing unit 5 includes a primary support ring 51 and a sealing gasket 52. The primary support ring 51 is clamped on the annular groove 110, and the sealing gasket 52 is sleeved between the main base 11 and the primary support ring 51. The structure of the sealing gasket 52 is a U-shaped gasket with a hollow interior. The U-shaped structural design of the sealing gasket 52 further enhances the sealing effect and ensures zero leakage of media such as lubricating oil. In addition, the setting of the primary sealing unit 5 provides a basis for subsequent sealing units and forms an effective sealing defense line.

[0031] The secondary sealing unit 6 includes a secondary support ring 61 and a No. 2 spring 62. The outer wall of the connecting end of the secondary support ring 61 is provided with a threaded groove 60. One end of the No. 2 spring 62 is sleeved in the threaded groove 60 on the secondary support ring 61. The other end of the No. 2 spring 62 is fixedly connected to the connection between the main base 11 and the secondary base 12. The tertiary sealing unit 7 includes a tertiary support ring 71 and a No. 3 spring 72. The tertiary support ring 71 is screwed on the outer wall of the secondary base 12. The outer wall of the connecting end of the tertiary support ring 71 is provided with a threaded groove 60. One end of the No. 3 spring 72 is sleeved on the secondary base 12. The other end of the No. 3 spring 72 is sleeved in the threaded groove 60 on the outer wall of the connecting end of the tertiary support ring 71. Through the threaded grooves 60 on the secondary support ring 61 and the tertiary support ring 71, in cooperation with the No. 2 spring 62 and the No. 3 spring 72, the preload force adjustment of the sealing assembly is realized. This design not only ensures the tight fit of the sealing assembly, but also provides good buffering and compensation capabilities through the elastic action of the spring to adapt to the thermal expansion and contraction and mechanical vibration of the equipment.

[0032] The annular circular wing ends of the primary support ring 51, the secondary support ring 61 and the tertiary support ring 71 are all components made of elastic materials; the sizes of the primary support ring 51, the secondary support ring 61 and the tertiary support ring 71 decrease successively. Through the decreasing size design, each level of sealing unit can provide precise sealing effect according to different sealing requirements, thereby enhancing the adaptability and flexibility of the entire sealing structure.

[0033] Working principle: The cover body 1 establishes the basic framework of the sealing structure through the fixed cooperation of the main base 11 and the secondary base 12. The annular groove 110 on the main base 11 provides a stable support for the primary support ring 51, and the setting of the friction ring 2 effectively reduces the direct friction between the cover body 1 and the connection, prolongs the service life of the sealing structure and provides additional sealing protection; the extrusion sealing mechanism 3 realizes uniform pressure distribution on the sealing surface through the coordinated action of the structural groove 30, the main ring seat 31, the elastic block 32 and the damping spring 33, ensuring the consistency and reliability of the sealing effect; the multi-stage sealing assembly 4 is composed of a primary sealing unit 5, a secondary sealing unit 6 and a tertiary sealing unit 7, forming a step-by-step strengthened sealing system, and the sealing gasket 52 in the primary sealing unit 5 adopts a U-shaped structure design, which is connected with a The secondary support ring 51 cooperates to provide a preliminary sealing defense line; the secondary sealing unit 6 and the tertiary sealing unit 7 realize the preload adjustment of the sealing assembly through the threaded groove 60 on the secondary support ring 61 and the tertiary support ring 71, in cooperation with the second spring 62 and the third spring 72, thereby ensuring the close fit of the sealing assembly. At the same time, the elastic effect of the spring provides good buffering and compensation for the thermal expansion and contraction and mechanical vibration of the equipment; the primary support ring 51, the secondary support ring 61 and the tertiary support ring 71 are made of elastic material and are designed with decreasing sizes, so that each level of sealing unit can provide precise sealing effect according to different sealing requirements, thereby enhancing the adaptability and flexibility of the entire sealing structure. This multi-level, progressive sealing design not only improves the sealing performance, but also greatly enhances the reliability and durability of the sealing structure.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although 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 sealing structure for a speed increasing gearbox cover, comprising a cover body (1), a main base (11), and a secondary base (12), wherein the main base (11) is fixedly provided in the middle of one end surface of the cover body (1), and the secondary base (12) is fixedly provided in the middle of the main base (11), characterized in that: The main base (11) is provided with an extrusion sealing mechanism (3) and a multi-stage sealing assembly (4), wherein the multi-stage sealing assembly (4) is composed of a primary sealing unit (5), a secondary sealing unit (6) and a tertiary sealing unit (7); The extrusion sealing mechanism (3) comprises a structural groove (30), a main ring seat (31), an extrusion elastic block (32) and a damping spring (33); the main ring seat (31) is fixedly connected to the outer wall of the main base (11); a plurality of structural grooves (30) are circumferentially distributed on the main ring seat (31); damping springs (33) are fixedly arranged in the plurality of structural grooves (30); and the extrusion elastic block (32) is fixedly connected to the damping spring (33).

2. The sealing structure of the speed increasing gearbox cover according to claim 1, characterized in that: The size of the opening end of the structural groove (30) is smaller than the size of the deep end, and the opening end is in contact with the extrusion elastic block (32).

3. The sealing structure of the speed increasing gearbox cover according to claim 1, characterized in that: The main base (11) is provided with an annular groove (110).

4. The sealing structure of the speed increasing gearbox cover according to claim 3, characterized in that: The primary sealing unit (5) comprises a primary support ring (51) and a sealing gasket (52); the primary support ring (51) is clamped on the annular groove (110); the sealing gasket (52) is sleeved between the main base (11) and the primary support ring (51); the sealing gasket (52) is a U-shaped gasket with a hollow interior.

5. The sealing structure of the speed increasing gearbox cover according to claim 4, characterized in that: The secondary sealing unit (6) comprises a secondary support ring (61) and a second spring (62); a thread groove (60) is provided on the outer wall of the connecting end of the secondary support ring (61); one end of the second spring (62) is sleeved in the thread groove (60) on the secondary support ring (61); and the other end of the second spring (62) is fixedly connected to the connecting portion between the main base (11) and the secondary base (12).

6. The sealing structure of the speed increasing gearbox cover according to claim 5, characterized in that: The three-stage sealing unit (7) comprises a three-stage support ring (71) and a third spring (72); the three-stage support ring (71) is screwed onto the outer wall of the secondary base (12); a thread groove (60) is provided on the outer wall of the connecting end of the three-stage support ring (71); one end of the third spring (72) is sleeved on the secondary base (12); and the other end of the third spring (72) is sleeved in the thread groove (60) on the outer wall of the connecting end of the three-stage support ring (71).

7. The sealing structure of the speed increasing gearbox cover according to claim 6, characterized in that: The annular circular wing ends of the primary support ring (51), the secondary support ring (61) and the tertiary support ring (71) are all components made of elastic materials.

8. The sealing structure of the speed increasing gearbox cover according to claim 6, characterized in that: The sizes of the primary support ring (51), the secondary support ring (61) and the tertiary support ring (71) decrease in sequence.

9. The sealing structure of the speed increasing gearbox cover according to claim 1, characterized in that: A friction ring (2) is sleeved on the outer wall of the main base (11), and the friction ring (2) is located between the cover body (1) and the extrusion sealing mechanism (3).

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