High-speed oil seal

Abstract

The utility model relates to the technical field of oil seals, in particular to a high-speed oil seal. A high-speed oil seal comprises a framework, an elastic sealing body and an oil collecting ring, and the framework is embedded into the elastic sealing body to support the elastic sealing body; the part, close to the rotating shaft, of the elastic sealing body extends obliquely upwards to form a main sealing lip, and the part, close to the rotating shaft, of the elastic sealing body extends obliquely downwards to form an auxiliary sealing lip; the oil collecting ring comprises a first wall face and a second wall face which are arranged at an angle, and when the oil collecting ring is clamped into the elastic sealing body, the first wall face of the oil collecting ring abuts against the inner side wall of the elastic sealing body. The high-speed oil seal is provided with the oil collecting ring, so that when splashing lubricating oil makes contact with the oil collecting ring, the lubricating oil can drop on the rotating shaft along the oil collecting ring in a concentrated mode, the lubricating performance between the sealing lip and the rotating shaft can be improved while heat is taken away, and the service life of the oil seal is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology, and in particular to a high-speed oil seal. Background Technology

[0002] Oil seals are used on the input shaft of the reducer in motor-driven mining trucks. Their purpose is to seal the oil inside the reducer, preventing oil leakage to the motor and subsequent motor failure. Because the reducer is driven by a motor, the motor's speed is much higher than that of a traditional internal combustion engine. This increased speed causes the oil seal lip to heat up faster, leading to accelerated wear, reduced durability, and ultimately, a shorter oil seal lifespan.

[0003] Meanwhile, most existing oil seals use a rubber lip with a spring or PTFE sheet as the main lip. When this lip structure is used in high-speed applications, the relatively large lip clamping force will further cause the lip to heat up, accelerate wear, and lead to oil leakage, ultimately causing damage to other components. Utility Model Content

[0004] In view of at least one of the above technical problems, the present invention provides a high-speed oil seal that improves the service life of the oil seal under high speed conditions.

[0005] This utility model provides a high-speed oil seal, including a skeleton, an elastic sealing body, and an oil collecting ring. The skeleton is embedded inside the elastic sealing body to support it. The portion of the elastic sealing body near the rotating shaft has a main sealing lip extending obliquely upward, and the portion of the elastic sealing body near the rotating shaft has a secondary sealing lip extending obliquely downward. The oil collecting ring includes a first wall surface and a second wall surface set at an angle. When the oil collecting ring is inserted into the elastic sealing body, the first wall surface of the oil collecting ring abuts against the inner wall of the elastic sealing body.

[0006] Furthermore, the oil collecting ring is provided with multiple through holes, which are evenly spaced along the circumference of the second wall.

[0007] Furthermore, the inner wall of the main sealing lip is provided with an oil return line and a smoothing section, with the smoothing section located at the end of the main sealing lip.

[0008] Furthermore, the length H of the smooth portion is 0.2mm~0.4mm.

[0009] Furthermore, the oil return line section is equipped with multiple oil return lines, which are spiral lines.

[0010] Furthermore, a chamfer is provided on the first wall surface of the oil collecting ring.

[0011] Furthermore, the thickness of the main sealing lip is 0.55mm~0.85mm.

[0012] Furthermore, the number of through holes is 4-8.

[0013] Furthermore, the oil collecting ring is made of metal.

[0014] Furthermore, the elastic seal is made of rubber.

[0015] The beneficial effects of this invention are as follows: The high-speed oil seal is equipped with an oil collecting ring, which allows splashed lubricating oil to drip onto the rotating shaft when it comes into contact with the ring. This not only removes heat but also improves the lubrication performance between the sealing lip and the rotating shaft, thus extending the oil seal's lifespan. Simultaneously, multiple through holes on the oil collecting ring ensure more efficient oil circulation, preventing excessive oil accumulation in the cavity formed by the second wall of the oil collecting ring and the inner wall of the elastic seal body, further enhancing heat dissipation. Furthermore, the main sealing lip employs a springless and thin-plate design, reducing the shaft-clamping force and thus minimizing heat generated by friction between the rotating shaft and the oil seal during high-speed rotation, reducing wear and further extending the oil seal's lifespan. The smooth design of the main sealing lip ensures that the high-speed oil seal does not leak oil even during short-term reverse rotation of the rotating shaft. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the high-speed oil seal in an embodiment of this utility model;

[0018] Figure 2 This is a partially enlarged structural diagram of the high-speed oil seal in an embodiment of this utility model;

[0019] Figure 3 This is a partially enlarged structural diagram of the oil collecting ring in an embodiment of this utility model;

[0020] Figure 4 This is a partially enlarged structural diagram of the main sealing lip in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the through hole structure of the oil collecting ring in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Skeleton; 2. Elastic sealing body; 3. Oil collecting ring; 4. Through hole; 21. Main sealing lip; 22. Secondary sealing lip; 31. First wall surface; 32. Second wall surface; 211. Oil return line section; 212. Smooth section; 311. Chamfer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", and "radial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the clarity of the technical solution and the convenience of description, and therefore should not be construed as limiting the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] See Figure 1 and Figure 2 This utility model provides a high-speed oil seal, including a skeleton 1, an elastic sealing body 2, and an oil collecting ring 3. The skeleton 1 is embedded inside the elastic sealing body 2, providing support for the elastic sealing body 2. The elastic sealing body 2 is made of rubber. The skeleton 1 is made of metal or plastic. More specifically, the skeleton 1 and the elastic sealing body 2 are connected by applying adhesive to the skeleton 1 and then chemically cross-linking and bonding them during the vulcanization process, so that the skeleton 1 and the elastic sealing body 2 form a whole, that is, the elastic sealing body 2 completely wraps around the skeleton 1, so that the skeleton 1 provides support for the elastic sealing body 2.

[0029] The elastic seal 2 is provided with a sealing lip that fits tightly against the rotating shaft, including a main sealing lip 21 and a secondary sealing lip 22. More specifically, the portion of the elastic seal 2 near the rotating shaft (not shown in the figure) has the main sealing lip 21 extending obliquely upwards, and the portion of the elastic seal 2 near the rotating shaft has the secondary sealing lip 22 extending obliquely downwards. When the oil seal is working, the main sealing lip 21 of the elastic seal 2 fits tightly against the rotating shaft and plays the main sealing role. In a specific embodiment, the main sealing lip 21 is a thin rubber sheet structure with a thickness of 0.55mm to 0.85mm. The springless structural design of the main sealing lip 21, combined with the thickness design of the main sealing lip 21, can reduce the shaft-clamping force of the main sealing lip 21, thereby reducing the heat generated by friction between the rotating shaft and the oil seal during high-speed rotation, reducing wear, and improving the life of the oil seal.

[0030] See Figures 1 to 3 The oil collecting ring 3 includes a first wall surface 31 and a second wall surface 32 arranged at an angle. When the oil collecting ring 3 is inserted into the elastic sealing body 2, the first wall surface 31 of the oil collecting ring 3 and the inner wall of the elastic sealing body 2 abut against each other and are not prone to relative sliding, so that the skeleton 1, the elastic sealing body 2 and the oil collecting ring 3 form an integral high-speed oil seal. In one specific embodiment, the oil collecting ring 3 is made of metal, but it can also be made of other materials that meet the corresponding usage conditions (such as high temperature resistance and oil resistance). The oil collecting ring 3 is essentially a retaining ring structure. When the reducer of the mining truck is running, there will be splashed lubricating oil inside. Due to the oil collecting ring 3, when the splashed lubricating oil comes into contact with the oil collecting ring 3, the lubricating oil will drip down the oil collecting ring 3 and fall onto the rotating shaft more quickly, thus carrying away the heat on the rotating shaft more quickly. In addition, the gap between the inner diameter of the oil collecting ring 3 and the rotating shaft is 1.0mm~3.0mm to ensure that the lubricating oil droplets can fall onto the rotating shaft.

[0031] Continue reading Figures 1 to 3 The first wall surface 31 of the oil collecting ring 3 is provided with a chamfer 311, which makes it easier to insert the oil collecting ring 3 into the elastic sealing body 2.

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 5 The oil collecting ring 3 has multiple through holes 4, which are evenly spaced along the circumference of the second wall surface 32. The number of through holes 4 is 4-8. In this embodiment, 6 through holes 4 are provided. The multiple through holes 4 on the oil collecting ring 3 ensure more efficient circulation of lubricating oil and prevent excessive oil accumulation in the cavity formed by the second wall surface 32 of the oil collecting ring 3 and the inner wall of the elastic seal 2, thus improving heat dissipation. Simultaneously, it further improves lubrication between the sealing lip and the rotating shaft, extending the life of the oil seal.

[0033] See Figure 2 and Figure 4 The inner wall of the main sealing lip 21 is provided with an oil return line section 211 and a smooth section 212. The oil return line section 211 has multiple oil return lines, which are spiral lines. This spiral oil return line design improves the pumping capacity of the main sealing lip 21. In a specific embodiment, the spiral direction of the oil return lines can be left-handed or right-handed, and the specific spiral direction is determined by the rotation direction of the rotating shaft when the mining truck advances.

[0034] The smoothing part 212 is located at the end of the main sealing lip 21. The length H of the smoothing part 212 is 0.2mm~0.4mm. Its purpose is to ensure that the oil seal does not leak oil when the mining truck reverses, i.e., when the motor rotates in the opposite direction for a short time.

[0035] In summary, this high-speed oil seal features an oil collecting ring 3, which allows splashed lubricating oil to drip onto the rotating shaft when it comes into contact with the ring. This not only removes heat but also improves the lubrication performance between the sealing lip and the rotating shaft, thus extending the oil seal's lifespan. Simultaneously, multiple through holes 4 on the oil collecting ring 3 ensure more efficient oil circulation, preventing excessive oil accumulation in the cavity formed by the second wall 32 of the oil collecting ring 3 and the inner wall of the elastic sealing body 2, further enhancing heat dissipation. Furthermore, the springless and thin-plate design of the main sealing lip 21 reduces the shaft-holding force, thereby decreasing the heat generated by friction between the rotating shaft and the oil seal during high-speed rotation and reducing wear, further extending the oil seal's lifespan. The smooth portion 212 at the main sealing lip 21 ensures that the high-speed oil seal does not leak oil even during short-term reverse rotation of the rotating shaft (such as when a mining truck reverses).

[0036] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-speed oil seal, characterized in that, The system includes a frame (1), an elastic sealing body (2), and an oil collecting ring (3). The frame (1) is embedded inside the elastic sealing body (2) to support the elastic sealing body (2). The portion of the elastic sealing body (2) near the rotation axis has a main sealing lip (21) extending obliquely upward, and the portion of the elastic sealing body (2) near the rotation axis has a secondary sealing lip (22) extending obliquely downward. The oil collecting ring (3) includes a first wall surface (31) and a second wall surface (32) set at an angle. When the oil collecting ring (3) is inserted into the elastic sealing body (2), the first wall surface (31) of the oil collecting ring (3) abuts against the inner wall of the elastic sealing body (2).

2. The high-speed oil seal according to claim 1, characterized in that, The oil collecting ring (3) is provided with a plurality of through holes (4), which are evenly spaced along the circumference of the second wall surface (32).

3. The high-speed oil seal according to claim 1, characterized in that, The inner wall of the main sealing lip (21) is provided with an oil return line (211) and a smooth part (212), and the smooth part (212) is located at the end of the main sealing lip (21).

4. The high-speed oil seal according to claim 3, characterized in that, The length H of the smooth portion (212) is 0.2mm to 0.4mm.

5. The high-speed oil seal according to claim 3, characterized in that, The oil return line section (211) is provided with multiple oil return lines, and the oil return lines are spiral lines.

6. The high-speed oil seal according to claim 1, characterized in that, The first wall surface (31) of the oil collecting ring (3) is provided with a chamfer (311).

7. The high-speed oil seal according to claim 1, characterized in that, The thickness of the main sealing lip (21) is 0.55mm~0.85mm.

8. The high-speed oil seal according to claim 2, characterized in that, The number of through holes (4) is 4-8.

9. The high-speed oil seal according to claim 1, characterized in that, The oil collecting ring (3) is made of metal.

10. The high-speed oil seal according to claim 1, characterized in that, The elastic sealing body (2) is made of rubber.

Images