Gearbox bottom flange oil return sealing structure

Abstract

A gearbox bottom flange oil return sealing structure relates to gearbox sealing. This invention addresses the problem of leakage caused by the insertion of adjusting shims into the gearbox bottom flange during shaft alignment adjustments, leading to seal failure. The oil return port of the oil return tank has a stepped section. A VD rubber sealing ring and a sealing adjustment element are longitudinally arranged within the oil return port. The upper end face of the VD rubber sealing ring abuts against the lower surface of the gearbox, and the lower end face of the sealing adjustment element abuts against the upper end face of the sealing adjustment element. The lower end face of the sealing adjustment element abuts against the stepped section of the oil return port. An end face seal is formed between the VD rubber sealing ring and the oil outlet of the gearbox bottom. An O-ring is fitted onto the outer wall of the sealing adjustment element, and its outer wall abuts against the inner wall of the oil return port, forming a radial seal between the O-ring and the oil return hole. This invention is primarily used for sealing the oil return of gearbox bottom flanges.

Description

Technical Field

[0001] This invention relates to gearbox sealing, and more particularly to a gearbox bottom flange oil return sealing structure. Background Technology

[0002] In gearbox equipment oil return schemes, the bottom flange of the gearbox is often used for oil return. Since gearbox installation often involves shaft alignment, adjusting shims are frequently inserted at the bottom flange of the gearbox to adjust the shaft alignment. This can lead to the failure of the bottom flange oil return seal and leakage. Summary of the Invention

[0003] The technical problem this invention aims to solve is that during gearbox installation, the insertion of adjusting shims at the bottom flange of the gearbox for shaft alignment causes the bottom flange oil return seal to fail, resulting in leakage. Therefore, this invention provides a gearbox bottom flange oil return sealing structure. This oil return structure ensures that when the gearbox uses a bottom flange oil return scheme, the seal remains effective even after adjusting the alignment by inserting shims under the bottom flange.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A gearbox bottom flange oil return sealing structure includes a sealing adjustment component, a VD rubber sealing ring, and an O-ring. The diameter of the oil return port of the oil return tank is larger than the diameter of the gearbox oil outlet, and the oil return port of the oil return tank is positioned directly opposite the gearbox oil outlet. A step is provided inside the oil return port of the oil return tank. The VD rubber sealing ring and the sealing adjustment component are longitudinally arranged sequentially inside the oil return port of the oil return tank. The upper end face of the VD rubber sealing ring abuts against the lower surface of the gearbox, and the lower end face of the VD rubber sealing ring abuts against the upper end face of the sealing adjustment component. The lower end face of the sealing adjustment component abuts against the step of the oil return port of the oil return tank. An end face seal is formed between the VD rubber sealing ring and the oil outlet of the gearbox bottom. The O-ring is fitted on the outer wall of the sealing adjustment component, and the outer wall of the O-ring abuts against the inner wall of the oil return port, forming a radial seal between the O-ring and the oil return hole.

[0006] Furthermore, a sealing adjustment pad is provided between the VD rubber sealing ring and the sealing adjustment component. The lower end face of the VD rubber sealing ring abuts against the upper end face of the sealing adjustment pad, and the lower end face of the sealing adjustment pad abuts against the upper end face of the sealing adjustment component.

[0007] Furthermore, the sealing adjustment component includes an axially integrally formed upper sealing ring and a lower sealing ring, with the VD rubber sealing ring and the sealing adjustment pad fitted on the upper sealing ring, and the lower end face of the sealing adjustment pad abutting against the upper end face of the lower sealing ring.

[0008] Furthermore, a certain gap is left between the upper surface of the return oil tank and the lower surface of the gearbox, and a gearbox adjusting shim is provided between the two. The diameter of the gearbox adjusting shim is larger than the diameter of the return oil port of the return oil tank, and the gearbox adjusting shim is fitted onto the return oil port of the return oil tank.

[0009] Furthermore, both the sealing adjustment pad and the gearbox adjustment pad are made of rubber.

[0010] Furthermore, the sealing adjustment component is made of metal.

[0011] The beneficial effects of this invention compared to the prior art are:

[0012] 1. When aligning the shaft system of the gearbox, the present invention can adjust the sealing contact stress between the VD rubber sealing ring and the bottom flange of the gearbox by adjusting the thickness of the gearbox adjusting shim and the sealing adjusting shim, thereby achieving the axial sealing effect between the oil outlet of the gearbox and the oil return port of the oil return tank.

[0013] 2. The present invention forms a radial seal by fitting an O-ring onto the sealing adjustment component, with the outer wall of the O-ring abutting against the inner wall of the oil return port. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are provided to further illustrate the invention.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a partially enlarged view of the sealing structure of the present invention.

[0017] Figure 3 This is a structural schematic diagram of the sealing adjustment component.

[0018] Explanation of reference numerals in the attached drawings: 1-Gearbox; 2-Sealing adjustment shim; 3-Gearbox adjustment shim; 4-Sealing adjustment component; 4-1-Upper sealing ring; 4-2-Lower sealing ring; 5-VD rubber sealing ring; 6-O-ring seal; 7-Oil return tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] See Figure 1This application provides a gearbox bottom flange oil return sealing structure, which includes a sealing adjustment pad 2, a gearbox adjustment pad 3, a sealing adjustment component 4, a VD rubber sealing ring 5, and an O-ring sealing ring 6;

[0021] A certain gap is left between the upper surface of the oil return tank 7 and the lower surface of the gearbox 1, and a gearbox adjusting shim 3 is provided between them. The diameter of the gearbox adjusting shim 3 is larger than the diameter of the oil return port of the oil return tank 7. The gearbox adjusting shim 3 is fitted onto the oil return port of the oil return tank 7. The diameter of the oil return port of the oil return tank 7 is larger than the diameter of the oil outlet of the gearbox 1, and the oil return port of the oil return tank 7 is positioned directly opposite the oil outlet of the gearbox 1. A step is provided inside the oil return port of the oil return tank 7. The VD rubber sealing ring 5, the sealing adjusting shim 2, and the sealing adjusting component 4 are arranged longitudinally in sequence inside the oil return port of the oil return tank 7. The upper end face of the D rubber sealing ring 5 abuts against the lower surface of the gearbox 1, the lower end face of the VD rubber sealing ring 5 abuts against the upper end face of the sealing adjustment pad 2, the lower end face of the sealing adjustment pad 2 abuts against the upper end face of the sealing adjustment component 4, and the lower end face of the sealing adjustment component 4 abuts against the step of the oil return port of the oil return tank 7; the VD rubber sealing ring 5 can form an end face seal with the oil return hole on the bottom flange of the gearbox 1; the O-ring sealing ring 6 is sleeved on the outer wall of the sealing adjustment component 4, the outer wall of the O-ring sealing ring 6 abuts against the inner wall of the oil return port, and a radial seal is formed between the O-ring sealing ring 6 and the oil return hole.

[0022] In this embodiment, the sealing adjustment component 4 includes an axially integrally formed upper sealing ring 4-1 and a lower sealing ring 4-2. The VD rubber sealing ring 5 and the sealing adjustment pad 2 are fitted on the upper sealing ring 4-1, and the lower end face of the sealing adjustment pad 2 abuts against the upper end face of the lower sealing ring 4-2.

[0023] In this embodiment, both the sealing adjustment pad 2 and the gearbox adjustment pad 3 are made of rubber.

[0024] In this embodiment, the sealing adjustment component 4 is made of metal.

[0025] In this embodiment, when the gearbox shaft system is aligned, adjusting the thickness of the gearbox adjusting shim 3 and the sealing adjusting shim 2 can adjust the sealing contact stress between the VD rubber sealing ring 5 and the bottom flange of the gearbox 1, thereby achieving an axial sealing effect between the oil outlet of the gearbox and the oil return port of the oil return tank.

[0026] This invention is used to achieve sealing when the gearbox uses a bottom flange for oil return.

[0027] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A gearbox bottom flange oil return sealing structure, characterized in that: It includes a sealing adjustment component (4), a VD rubber sealing ring (5), and an O-ring (6); the diameter of the oil return port of the oil return tank (7) is larger than the diameter of the oil outlet of the gearbox (1), and the oil return port of the oil return tank (7) is set directly opposite the oil outlet of the gearbox (1). A step is provided inside the oil return port of the oil return tank (7). The VD rubber sealing ring (5) and the sealing adjustment component (4) are arranged longitudinally in sequence inside the oil return port of the oil return tank (7). The upper end face of the VD rubber sealing ring (5) abuts against the gearbox (1). The lower surface of the VD rubber sealing ring (5) abuts against the upper surface of the sealing adjustment member (4), and the lower surface of the sealing adjustment member (4) abuts against the step of the oil return port of the oil return tank (7); the VD rubber sealing ring (5) and the oil outlet at the bottom of the gearbox (1) form an end face seal; the O-ring sealing ring (6) is fitted on the outer wall of the sealing adjustment member (4), and the outer wall of the O-ring sealing ring (6) abuts against the inner wall of the oil return port, and the O-ring sealing ring (6) and the oil return port form a radial seal.

2. The gearbox bottom flange oil return sealing structure according to claim 1, characterized in that: A sealing adjustment pad (2) is also provided between the VD rubber sealing ring (5) and the sealing adjustment component (4). The lower end face of the VD rubber sealing ring (5) abuts against the upper end face of the sealing adjustment pad (2), and the lower end face of the sealing adjustment pad (2) abuts against the upper end face of the sealing adjustment component (4).

3. The gearbox bottom flange oil return sealing structure according to claim 2, characterized in that: The sealing adjustment component (4) includes an axially integrally formed upper sealing ring (4-1) and a lower sealing ring (4-2). The VD rubber sealing ring (5) and the sealing adjustment pad (2) are fitted on the upper sealing ring (4-1), and the lower end face of the sealing adjustment pad (2) abuts against the upper end face of the lower sealing ring (4-2).

4. The gearbox bottom flange oil return sealing structure according to claim 3, characterized in that: There is a certain gap between the upper surface of the return oil tank (7) and the lower surface of the gearbox (1), and a gearbox adjusting pad (3) is provided between them. The diameter of the gearbox adjusting pad (3) is larger than the diameter of the return oil port of the return oil tank (7), and the gearbox adjusting pad (3) is fitted on the return oil port of the return oil tank (7).

5. The gearbox bottom flange oil return sealing structure according to claim 4, characterized in that: Both the sealing adjustment pad (2) and the gearbox adjustment pad (3) are made of rubber.

6. The gearbox bottom flange oil return sealing structure according to claim 5, characterized in that: The sealing adjustment component (4) is made of metal.

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