Rotary sealing oil conduit structure
By adopting a rotary sealing structure of oil guide pipe and O-ring in the transmission, the elasticity and hydraulic pressure of the sealing ring are used to achieve directional fixation and eccentric compensation, the problems of poor sealing performance and high cost in the prior art are solved, and high efficiency is achieved. Reliable rotation sealing effect.
Patent Information
- Application Number
- CN202323507361.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-21
AI Technical Summary
The existing rotary sealing technology has poor sealing performance, high cost and difficult to compensate for the manufacturing and assembly errors of parts in transmissions, resulting in low reliability and efficiency.
It adopts a rotary sealing structure including an oil guide tube and an O-ring. The oil guide tube and the part are sealed and connected through an O-ring, and the elasticity and hydraulic pressure of the sealing ring are used to achieve directional fixation and eccentric compensation, which is suitable for the connection between rotating parts. Ability to maintain sealing performance during manufacturing and assembly errors.
It realizes efficient and reliable rotary sealing, reduces costs, and can be widely used in various transmissions to ensure sealing performance and efficiency.
Smart Images
Figure CN222334455U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of transmissions, in particular to a rotary sealed oil guide pipe structure. Background Art
[0002] Lubrication is a technical measure to improve the friction state of the friction pair through lubricants to reduce friction resistance, slow down wear, and prevent rust, improve NVH performance, and achieve energy dissipation. Making full use of modern lubrication technology can significantly improve the performance and life of the transmission. It is mainly divided into grease lubrication and oil lubrication. Compared with grease lubrication, oil lubrication has a wide range of applications and high reliability. Commonly used oil lubrication methods for transmissions include oil immersion lubrication, splash lubrication, and pressure circulation lubrication. Pressure circulation lubrication can achieve precise lubrication control at fixed points and in fixed quantities. It is reliable, efficient, and has low energy consumption, and has a wider application prospect.
[0003] Sealing performance is an important indicator for evaluating pressure circulation lubrication systems. Commonly used sealing forms include static seals, piston seals and rotary seals, and rotary seals have the greatest impact and are the most difficult of the three. Commonly used rotary seals include: ordinary oil guide pipe seals or special rotary seals.
[0004] Ordinary oil pipe seals are simple and low in cost, but have poor sealing performance, high friction loss and poor reliability; special rotary seals have good sealing performance and low friction loss, but they cannot compensate for the centering deviation of parts, have high requirements on the manufacturing and assembly precision of the system and have high seal cost. Utility Model Content
[0005] In order to solve the problems existing in the prior art, the utility model provides a rotary sealed oil guide pipe structure, which has compact structure, low cost, reliability and high efficiency, is suitable for the rotary sealed oil guide pipe structure and can be applied to various transmissions.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A rotary sealed oil guide pipe structure, comprising an oil guide pipe and an O-ring;
[0008] The oil guide pipe is installed between the first part and the second part, and the oil guide pipe is aligned with the oil holes of the first part and the second part;
[0009] A groove is provided at the connection position between the oil guide pipe and the first part, the O-ring is installed inside the groove, the oil guide pipe and the first part are sealed and connected via the O-ring, and the oil guide pipe and the second part are plug-fitted.
[0010] Preferably, the working state between the first part and the second part includes: the first part is fixed and the second part rotates, the first part rotates and the second part is fixed, and the first part and the second part rotate simultaneously.
[0011] Preferably, the diameter of the oil hole of the first part is smaller than the diameter of the oil hole of the second part.
[0012] Preferably, chamfers are provided on the outer sides of both ends of the oil guide pipe.
[0013] Preferably, an annular boss is provided on the outer side of the oil guide pipe, and the annular boss is in contact with the outer side wall of the oil hole of the first part.
[0014] Preferably, the oil in the oil guide pipe flows from the second part into the first part.
[0015] Preferably, the gap between the oil guide tube and the second part is in the range of 0.025-0.05 mm.
[0016] Preferably, the O-ring is made of nitrile rubber or fluororubber.
[0017] Preferably, the oil guide pipe is made of stainless steel.
[0018] Compared with the prior art, the utility model has the following beneficial technical effects:
[0019] The utility model provides an oil guide pipe structure of a rotary seal, which has the functions of directional fixing and eccentric compensation, and can be used for the connection between rotating parts / rotating parts, rotating parts / fixed parts, and has high reliability, good sealing performance and high efficiency. The oil guide pipe is fixed to part one under the dual effects of the elastic force of the sealing ring and the hydraulic pressure, and the other side of the oil guide pipe cooperates with part two. When the parts on both sides of the system are misaligned due to manufacturing errors, assembly errors or flexible deformation, the oil guide pipe and part two remain unchanged, and the misalignment deviation is compensated by the elastic deformation of the seal, so that the oil guide pipe is not affected by the misalignment and can work normally. It has a compact structure, low cost, reliability and high efficiency, and can be widely used in various transmissions. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of an ideal state of the oil guide pipe structure of a rotary seal of the utility model;
[0021] Figure 2 This is a schematic diagram of the working state of the oil guide pipe structure of a rotary seal of the utility model;
[0022] In the accompanying drawings: 1 is an oil guide pipe, 2 is a first component, 3 is a second component, and 4 is an O-ring. DETAILED DESCRIPTION
[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 referred device or element 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.
[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0028] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
[0029] The utility model provides an oil guide pipe structure that is compact, low-cost, reliable, and efficient, and is suitable for rotary sealing, and can be applied to various transmissions. To this end, the utility model provides an oil guide pipe with directional fixing and eccentric compensation functions, which can be used for the connection between rotating parts / rotating parts and rotating parts / fixed parts, and has high reliability, good sealing performance, and high efficiency. The oil guide pipe is fixed to part one under the dual effects of the elastic force of the sealing ring and the hydraulic pressure, and the other side of the oil guide pipe cooperates with part two. When the parts on both sides of the system are misaligned due to manufacturing errors, assembly errors, or flexible deformation, the oil guide pipe and part two remain unchanged, and the misalignment deviation is compensated by the elastic deformation of the seal, so that the oil guide pipe is not affected by the misalignment and can work normally. The utility model has a compact structure, low cost, reliability, and high efficiency, and can be widely used in various transmissions.
[0030] Combined with Figure 1 and Figure 2 Further explanation of the technical solution of the utility model: the oil guide tube 1 is placed between the first part 2 and the second part 3, and is aligned with the oil holes of the first part 2 and the second part 3. The O-ring 4 is placed between the oil guide tube 1 and the first part 2 to seal the lubricating oil. There is a small gap between the oil guide tube 1 and the oil hole of the second part 3, allowing a very small flow of lubricating oil to leak.
[0031] There are three working states between the first part 2 and the second part 3 (see Table 1): the first part 2 is fixed and the second part 3 rotates, the first part 2 rotates and the second part 3 is fixed, and the first part 2 and the second part 3 rotate simultaneously.
[0032] Under ideal conditions, the gap between the oil guide pipe 1 and the oil hole of the first part 2 is X, and the gap between the oil guide pipe 2 and the oil hole of the second part 3 is Y.
[0033] When the transmission starts to operate, the oil holes of the oil pipe 1, the first part 2 and the second part 3 are filled with lubricating oil (the lubricating oil pressure is P), because the lubricating oil has different effective areas between the oil pipe 1 and the first part 2 and between the oil pipe 1 and the second part 3. The effective area A1 between the oil pipe 1 and the first part 2 is π*(D2*D2-D1*D1) / 4, and the effective area A2 between the oil pipe 1 and the second part 3 is π*(D3*D3-D1*D1) / 4. The oil pressure F borne by the oil pipe is P*(A2-A1). The oil pressure F makes the oil pipe 1 and the first part 2 close together, and there is no relative rotation between the two.
[0034] When the transmission is working, due to the assembly error of the transmission and the flexible deformation of the first part 2 and the second part 3, the gaps between the oil guide pipe 1 and the oil hole of the first part 2 are X1 and X2 respectively, and the gaps between the oil guide pipe 2 and the oil hole of the second part 3 are Y1 and Y2 respectively, X1+X2=2X, Y1+Y2=2Y, which shows that when there is a centering deviation between the oil guide pipe 1 and the first part 2 and the second part 3, the elastic deformation (compression rate) of the O-ring has a certain range, so that it can compensate for the centering deviation, that is, the uniform elastic deformation in the ideal state changes to the uneven elastic deformation in the working state, but the lubricating oil can still be effectively sealed.
[0035] The rotary seal oil guide pipe has a compact structure, low cost, reliability and high efficiency, and can be widely used in various transmissions.
[0036] Example
[0037] In an embodiment of the utility model, a rotary sealed oil guide pipe structure comprises an oil guide pipe 1, a first part 2, a second part 3 and an O-ring 4.
[0038] The oil guide pipe 1 is installed between the first part 2 and the second part 3 , and the oil guide pipe 1 is aligned with the oil holes of the first part 2 and the second part 3 .
[0039] A groove is provided at the connection portion between the oil guide pipe 1 and the first part 2, and an O-ring 4 is installed inside the groove. The oil guide pipe 1 and the first part 2 are sealed and connected through the O-ring 4, and the oil guide pipe 1 and the second part 3 are plugged and matched. In this embodiment, the gap between the oil guide pipe 1 and the second part 3 ranges from 0.025 to 0.05 mm. Both ends of the oil guide pipe 1 are provided with chamfers on the outside to facilitate connection.
[0040] The diameter of the oil hole of the first part 2 is smaller than that of the oil hole of the second part 3. The oil in the oil guide pipe 1 flows from the second part 3 into the first part 2. An annular boss is provided on the outside of the oil guide pipe 1, and the annular boss fits with the outer wall of the oil hole of the first part 2. Because the annular boss of the oil guide pipe 1 is blocked on the first part 2, the axial movement of the oil guide pipe 1 can be avoided when the pressure oil circulates; in this embodiment, the O-ring 4 is made of nitrile rubber or fluororubber, and the oil guide pipe 1 is made of stainless steel.
[0041] Table 1 Working status
[0042]
[0043]
[0044] Ideally, the oil guide tube 1 is placed between the first part 2 and the second part 3, and is aligned with the oil holes of the first part 2 and the second part 3. The gap between the oil guide tube 1 and the oil hole of the first part 2 is X, and the gap between the oil guide tube 2 and the oil hole of the second part 3 is Y.
[0045] When the transmission is working, the oil pipe is subjected to the oil pressure F from the lubricating oil because the effective areas of the lubricating oil between the oil pipe 1 and the first part 2 and between the oil pipe 1 and the second part 3 are different. The direction of the oil pressure F points from the side with a larger effective area to the side with a smaller effective area, so that the working state (fixed or rotating) of the oil pipe 1 and the first part 2 is consistent. The first part 2 and the second part 3 have three working states. In addition, due to the assembly error of the transmission and the bearing flexural deformation of the first part 2 and the second part 3, the gaps between the oil holes of the oil pipe 1 and the first part 2 are X1 and X2 respectively, and the gaps between the oil holes of the oil pipe 2 and the second part 3 are Y1 and Y2 respectively, X1+X2=2X, Y1+Y2=2Y, which indicates that when there is a centering deviation between the oil pipe 1 and the first part 2 and the second part 3, the elastic deformation (compression rate) of the O-ring has a certain range, so that it can compensate for this centering deviation, that is, the uniform elastic deformation in the ideal state changes to the uneven elastic deformation in the working state, but the lubricating oil can still be effectively sealed.
[0046] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0047] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.
Claims
1. A rotary sealed oil guide pipe structure, characterized in that: It comprises an oil guide pipe (1) and an O-ring (4); The oil guide pipe (1) is installed between the first part (2) and the second part (3), and the oil guide pipe (1) is aligned with the oil holes of the first part (2) and the second part (3); A groove is provided at the connection portion between the oil guide pipe (1) and the first part (2), the O-ring (4) is installed inside the groove, the oil guide pipe (1) and the first part (2) are sealed and connected via the O-ring (4), and the oil guide pipe (1) and the second part (3) are plug-fitted.
2. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The working states between the first part (2) and the second part (3) include: the first part (2) is fixed and the second part (3) is rotating, the first part (2) is rotating and the second part (3) is fixed, and the first part (2) and the second part (3) are rotating simultaneously.
3. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The diameter of the oil hole of the first part (2) is smaller than the diameter of the oil hole of the second part (3).
4. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The outer sides of both ends of the oil guide pipe (1) are provided with chamfers.
5. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: An annular boss is arranged on the outer side of the oil guide pipe (1), and the annular boss is in contact with the outer side wall of the oil hole of the first part (2).
6. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The oil in the oil guide pipe (1) flows from the second part (3) into the first part (2).
7. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The gap between the oil guide pipe (1) and the second part (3) ranges from 0.025 to 0.05 mm.
8. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The O-ring (4) is made of nitrile rubber or fluororubber.
9. The oil guide pipe structure of a rotary seal according to claim 1, characterized in that: The oil guide pipe (1) is made of stainless steel.