Sealing structure for high-speed end of horizontal speed reducer

Abstract

The utility model provides a high-speed end sealing structure of a horizontal speed reducer, which relates to the technical field of mechanical transmission and comprises a box body, a transparent cover and a high-speed shaft. The transparent cover is arranged on the box body, the high-speed shaft is provided with an oil slinger and a bearing, the high-speed shaft, the oil slinger and the bearing penetrate through an inner hole of the box body and are arranged on a bearing seat of the box body, and a rotating groove is machined in the high-speed shaft, so that the high-speed shaft and an inner cavity of the transparent cover form non-contact spiral sealing; an oil groove is formed in the box body, an oil groove is also formed in the position, corresponding to the position of the oil groove formed in the box body, of the transparent cover, and an oil return hole is formed in the bottom of the oil groove in the box body. According to the utility model, non-contact sealing is adopted, so that the abrasion among parts can be avoided, the reliability is high, and the maintenance cost caused by the abrasion of the parts can be avoided; and meanwhile, the arrangement of the oil groove and the oil return hole effectively ensures the lubrication of the bearing, and plays a role in enhancing the heat dissipation of the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a high-speed end sealing structure of a horizontal reducer. Background Art

[0002] Reducers are mechanical transmission devices used in many fields. They are of various types. According to the transmission type, they can be divided into gear reducers, worm reducers and planetary gear reducers, etc. In addition, they also include various special transmission devices, such as speed increase devices, speed regulating devices and various composite transmission devices including flexible transmission devices. The product service areas involve metallurgy, coal, building materials, shipbuilding, water conservancy, electric power, engineering machinery and petrochemical industries.

[0003] Most of the existing speed reducers are sealed by installing a transparent cover and a skeleton oil seal. During the operation of the speed reducer, the skeleton oil seal is always in contact with the high-speed shaft and rotates at a relatively high speed. Therefore, high requirements are placed on the processing of the high-speed shaft and the installation of the skeleton oil seal. After long-term operation, the skeleton oil seal and the high-speed shaft will be worn to a certain extent, resulting in a reduction in the sealing effect. At this time, in order to ensure the sealing effect, the equipment can only be shut down and the oil seal and wear-resistant sleeve must be replaced, and the high-speed shaft may even need to be replaced, which will result in a large time and economic loss.

[0004] Therefore, designing a new reducer high-speed end sealing structure and solving the above problems can effectively increase the service life of the equipment and reduce maintenance costs. Utility Model Content

[0005] The utility model provides a horizontal speed reducer high-speed end sealing structure, which removes the skeleton oil seal used in the prior art and replaces it with a non-contact mechanical seal type, thereby greatly increasing the life and reliability of the seal while ensuring its sealing performance.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A high-speed end sealing structure of a horizontal reducer, characterized in that it includes a housing, a transparent cover, and a high-speed shaft; the transparent cover is closed on the housing, an oil slinger and a bearing are installed on the high-speed shaft, the high-speed shaft, the oil slinger and the bearing pass through the inner hole of the housing and are installed on the bearing seat of the housing, a rotating groove is machined on the high-speed shaft, so that the high-speed shaft and the inner cavity of the transparent cover form a non-contact spiral seal; an oil groove is provided on the housing, and an oil groove is also provided at the transparent cover corresponding to the position of the oil groove on the housing, and an oil return hole is provided at the bottom of the oil groove on the housing for returning the lubricating oil between the transparent cover and the bearing into the housing.

[0008] Furthermore, the transparent cover is fastened to the box body by means of gaskets and bolts, and anaerobic sealant is arranged between the box body and the transparent cover for end face sealing.

[0009] Furthermore, a spacer sleeve is installed between the transparent cover and the bearing for axial positioning.

[0010] Furthermore, the spiral form of the rotating groove is rectangular, and the distance between each spiral outer edge and the inner hole of the transparent cover is 0.2 mm.

[0011] Furthermore, the oil slinger is in a Z-shape, a conical flange is processed on one end surface of the inner cavity of the transparent cover, and a gap is provided between the oil slinger and the conical flange.

[0012] Furthermore, the distance of the gap is 1 mm.

[0013] The beneficial effects of the utility model are:

[0014] The utility model has a simple structure and does not need to use a skeleton oil seal, thereby eliminating the cost of early procurement and subsequent replacement of the skeleton oil seal.

[0015] The utility model is a non-contact seal, which will not cause wear between parts, has high reliability and can avoid the maintenance cost caused by wear of parts.

[0016] The high-speed shaft in the utility model does not need special hardening and fine processing, which reduces the processing difficulty and the fine processing cost.

[0017] The arrangement of the oil groove and the oil return hole in the utility model effectively ensures the lubrication of the bearing and plays a role in strengthening the heat dissipation of the bearing.

[0018] The utility model can be used for horizontal speed reducers under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0020] Figure 1 It is a two-dimensional structural schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the oil tank and oil return hole of the box body of the utility model.

[0023] Figure 4 It is a schematic diagram of the structure of the utility model in the oil return state.

[0024] Figure 5 It is a schematic diagram of the oil tank with a transparent cover of the utility model.

[0025] Description of Figure Numbers:

[0026] 1. Box body; 2. Transparent cover; 3. High-speed shaft; 4. Bolts; 5. Washer; 6. Spacer; 7. Bearing; 8. Oil slinger; 9. Oil groove; 10. Oil return hole; 11. Oil level line. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] The utility model provides a technical solution: a horizontal reducer high-speed end sealing structure, such as Figure 1-5 As shown, it includes a box body 1, a transparent cover 2, a high-speed shaft 3, bolts 4, washers 5, spacers 6, bearings 7, and an oil slinger 8.

[0032] The transparent cover 2 is fastened to the housing 1 by bolts 4 and washers 5. The oil slinger 8 and the bearing 7 are installed on the high-speed shaft 3 by interference fit. The three pass through the inner hole of the housing 1 and are installed on the bearing seat of the housing 1. A spacer sleeve 6 is installed between the transparent cover 2 and the bearing 7 for axial positioning.

[0033] The housing 1 is fixed to the main frame. When the reducer is running, the housing 1, the transparent cover 2, the spacer 6 and the outer ring of the bearing 7 are stationary relative to the ground, and the high-speed shaft 3, the oil slinger 8 and the inner ring of the bearing 7 rotate.

[0034] Anaerobic sealant is applied between the box body 1 and the transparent cover 2 for end face sealing. The box body 1 and the transparent cover 2 are provided with oil grooves 9 for the lubricating oil between the transparent cover 2 and the bearing 7 to flow back into the box body. A spiral groove is machined on the high-speed shaft 3, which forms a non-contact spiral seal together with the inner surface of the transparent cover 2. The spiral form is rectangular, and the gap between the outer edge of the spiral and the inner hole of the transparent cover 2 is 0.2mm.

[0035] The oil slinger 8 is made by stamping and has a "Z" shape (in cross-sectional view). A conical flange is machined on one end face of the inner ring of the transparent cover 2, and there is a 1mm gap between the oil slinger 8 and the conical flange of the transparent cover 2.

[0036] A space A is formed between the oil slinger 8 and the spacer sleeve 6 and the bearing 7; a space B is formed between the transparent cover 2 and the spacer sleeve 6; a space C is formed between the oil slinger 8 and the transparent cover 2 and the high-speed shaft 3; a space D is formed at the lower part of the structure between the transparent cover 2 and the oil slinger 8, the spacer sleeve 6 and the bearing 7.

[0037] When the reducer is stationary, since the reducer adopts splash lubrication and the lubricating oil is not filled to the height where the high-speed shaft 3 is located, the lubricating oil will not leak through this structure.

[0038] When the reducer is working normally, the lubricating oil continuously enters space A through the gap between the rollers of bearing 7. At this time, the lubricating oil is blocked by the oil slinger 8, and due to its high-speed rotation, under the action of centrifugal force, the lubricating oil is thrown along the conical surface of the oil slinger 8 to the inner wall of space B, which is circular, and then continuously drips onto the outer wall of the inner ring of the transparent cover 2 under the action of gravity. The outer wall of the inner ring of the transparent cover 2 is designed with a conical flange, which greatly reduces the lubricating oil flowing into space C. Under the action of gravity, the lubricating oil entering space B will eventually flow into space D. Due to the high-speed rotation of the rollers of bearing 7, the lubricating oil in space D cannot flow back into the box body through the gap between the rollers very smoothly, so it accumulates in space D and forms an oil pool. When the oil pool reaches a certain height, the lubricating oil will flow back to the inside of the box body 1 from the oil groove 9 opened on the box body 1 and the transparent cover 2. The lubricating oil entering the space C, after reaching the spiral seal provided on the high-speed shaft 3, will become the sealing liquid of the spiral seal, and under the action of the spiral seal, the subsequent leakage of the lubricating oil is prevented.

[0039] The non-contact spiral seal uses the lubricating oil of the reducer as the sealing liquid. When the high-speed shaft 3 rotates, the lubricating oil filled in the spiral groove generates a pumping pressure head, and the highest pressure is generated at the spiral groove near the inside of the reducer, which is balanced with the lubricating oil pressure inside the reducer, that is, the pressure difference is 0, thereby preventing the lubricating oil from leaking out. This non-contact spiral seal can meet the sealing requirements of a maximum pressure of 2MPa and a linear speed of 30m / s for the high-speed shaft 3.

[0040] An oil groove 9 is provided on the housing 1, and an oil groove 9 is also provided at a corresponding position of the transparent cover 2. An oil return hole 10 is provided at the bottom of the oil groove 9 of the housing 1. The lowest point of the oil groove 9 is an oil level line 11, and its position determines the amount of oil stored between the bearing 7 and the transparent cover 2. The oil level line 11 is set at one-third to one-half of the roller of the bearing 7, which can not only lubricate the bearing 7, but also enhance the heat dissipation of the bearing.

[0041] The route of lubricating oil circulation between bearing 7 and transparent cover 2. When the lubricating oil between bearing 7 and transparent cover 2 exceeds the oil level line 11, the lubricating oil flows back to the inside of the box through spacer 6, oil groove 9 of transparent cover 2, oil groove 9 of box body 1, and oil return hole 10 of box body 1, completing the circulation of lubricating oil.

[0042] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A horizontal reducer high-speed end sealing structure, characterized in that: The invention comprises a housing (1), a transparent cover (2), and a high-speed shaft (3); the transparent cover (2) is assembled on the housing (1); an oil slinger (8) and a bearing (7) are installed on the high-speed shaft (3); the high-speed shaft (3), the oil slinger (8), and the bearing (7) pass through the inner hole of the housing (1) and are installed on the bearing seat of the housing (1); a rotating groove is machined on the high-speed shaft (3) so that the high-speed shaft (3) and the inner cavity of the transparent cover (2) form a non-contact spiral seal; an oil groove (9) is arranged on the housing (1); an oil groove (9) is also arranged at the transparent cover (2) corresponding to the position of the oil groove (9) on the housing (1); and an oil return hole (10) is arranged at the bottom of the oil groove (9) on the housing (1) for returning the lubricating oil between the transparent cover (2) and the bearing (7) into the housing (1).

2. The high-speed end sealing structure of the horizontal reducer according to claim 1 is characterized in that: The transparent cover (2) is fastened to the box body (1) via a gasket (5) and a bolt (4), and an anaerobic sealant is provided between the box body (1) and the transparent cover (2) to seal the end faces.

3. The high-speed end sealing structure of the horizontal reducer according to claim 1 is characterized in that: A spacer sleeve (6) is installed between the transparent cover (2) and the bearing (7) for axial positioning.

4. The high-speed end sealing structure of the horizontal reducer according to claim 1 is characterized in that: The spiral form of the rotating groove is rectangular, and the distance between the outer edge of each spiral and the inner hole of the transparent cover (2) is 0.2 mm.

5. The high-speed end sealing structure of the horizontal reducer according to claim 1 is characterized in that: The oil slinger (8) is in a Z-shape, one end surface of the inner cavity of the transparent cover (2) is processed with a conical flange, and a gap is provided between the oil slinger (8) and the conical flange.

6. The high-speed end sealing structure of the horizontal reducer according to claim 5 is characterized in that: The distance of the gap is 1 mm.

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